第18题: [单项选择]属于寰椎特征的是() A. 椎体最大 B. 无椎体、棘突和关节突 C. 椎体两侧与肋骨相接 D. 棘突特别长,不分叉,常作体表定位标志 E. 棘突宽大,呈板状,以矢状位后伸 参考答案:B 答案解析:颈椎椎体相对较小,寰椎由前、后弓和两侧弓组成,无椎体和关节突。隆椎棘突特别长,不分叉,体表易触摸。
第30题: [单项选择]He has made another discovery, ______ of great importance to science. A. which I think it is B. of which I think it is C. which I think is D. I think which is 参考答案:C 答案解析:[考点] (1)非限制性定语从句(2)插入语
[解析] which引导非限定性定语从句。严格意义上说,插入语并不算句子成分,只是起到补充说明的作用。本句中插入语是I think。